Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 525

May 25, 20189 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2018, 8:53 PM CDT for 9 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 25, 2018, 8:53 PM CDT (01:53 UTC)
Expired
May 25, 2018, 10:00 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Burnet County, TX, Gillespie County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Mills County, TX, San Saba County, TX

The radar

The San Angelo radar (KSJT), 150 km from the middle of the area, began a volume at 01:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 1.9 hours before the alert went out and 253 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2018-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 866 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2018-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
866 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
2735 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 9:17 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Foard and 8 more88 min
May 26, 11:58 AM CDTMesoscale DiscussionSPCJasper, Newton, Sabine, San Augustine, Tyler3 hr

Nearby

Mesoscale Discussions in Texas, 2018Every mesoscale discussion in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.